We are researching this idea about landing high altitude radiosondes back to where they are launched. Radiosondes are a meteorological equipment, launched with a weather balloon. They are lost almost every time, sometimes landing hundreds of kilometers away from the initial launch cite. https://en.wikipedia.org/wiki/Radiosonde
While researching we found this project - http://www.gpsboomerang.com/content/view/34/42/
It seems dead, but they seem to have proven it is possible to launch and land such a device.
The main requirment for such a glider are:
- Minimum weight - the bigger the weight the bigger the balloon you need and the more gas you need to inflate it. https://www.scientificsales.com/Meteorological-Weather-Sounding-Balloon-s/25.htm
- Operation in low temperature. During the flight the temperature can fall to -60.
- There should be a release mechanism to drop the glider before the balloon burst.
- It will not manage to land from where it started in strong winds, but it can always land somewhere else. There should be a list of possible GPS locations to land.
So can such a glider be made? Do you have alternative ideas that will do the job? Would it be very expensive?